ALIASES.put("cr", "rc");
        }

        /**
         * A comparable value for the empty-string qualifier. This one is used to determine if a given qualifier makes
         * the version older than one without a qualifier, or more recent.
         */
        private static final String RELEASE_VERSION_INDEX = String.valueOf(QUALIFIERS.indexOf(""));

        private final String value;

                ProjectBuildingException.class, () -> getProject(f1), "Expected to fail for past versions");
        assertThat(e.getMessage(), containsString("Building this project requires an older version of Maven"));
    }

    @Test
    void testFutureSchemaModelVersion() throws Exception {
        File f1 = getTestFile("src/test/resources/projects/future-schema-model-version-pom.xml");

                    Version.V20,
                    "modelVersion",
                    null,
                    "of '" + string + "' is older than the versions supported by this version of Maven: "
                            + validVersions + ". Building this project requires an older version of Maven.",
                    tracker);

        } else {
            addViolation(
                    problems,

                                destination.setLastModified(System.currentTimeMillis());
                            }
                        } catch (UnsupportedOperationException e) {
                            // older wagons throw this. Just get() instead
                            wagon.get(remotePath, temp);

                            downloaded = true;
                        }
                    } else {

    }

    private void assertVersionOlder(String left, String right) {
        assertTrue(
                newArtifactVersion(left).compareTo(newArtifactVersion(right)) < 0,
                left + " should be older than " + right);
        assertTrue(
                newArtifactVersion(right).compareTo(newArtifactVersion(left)) > 0,
                right + " should be newer than " + left);
    }